J''iC. 19. - Ovule in spring. Grov/ing pollsn tubos 

 X 440 



Fig, 20. - Pollon grain sv.'ollen by 'vator x 440 

 Fig, 21. - Pollen tubes with celluloso pulgs x440 

 Fig, 22. - Spher'ical protuberance on pollen tube 



X 1090 

 Fig. 23. - Section of style showing conductive 



tissue x 440. 



Fig, 24, - Section of base of fl^nicullls at time 

 flower opens x 440 



Fig. 25. - Same section at beginning of winter 

 x 440. 



Fig. 26. - Section of winter condition of flower, 

 x 18. 



